Thirteen type I loci from HSA4q, HSA6p, HSA7q and HSA12q were comparatively FISH-mapped in four river buffalo and sheep chromosomes.

Abstract

Thirteen goat BAC clones containing coding sequences from HSA7, HSA12q, HSA4 and HSA6p were fluorescence in situ mapped to river buffalo (Bubalus bubalis, BBU) and sheep (Ovis aries, OAR) R-banded chromosomes. The following type I loci were mapped: BCP to BBU8q32 and OAR4q32, CLCN1 to BBU8q34 and OAR4q34, IGFBP3 to BBU8q24 and OAR4q27, KRT to BBU4q21 and OAR 3q21, IFNG to BBU4q23 and OAR3q23, IGF1 to BBU4q31 and OAR3q31, GNRHR to BBU7q32 and OAR6q32, MTP to BBU7q21 and OAR6q15, PDE6B to BBU7q36 and OAR6q36, BF to BBU2p22 and OAR20q22, EDN1 to BBU2p24 and OAR20q24, GSTA1 to BBU2p22 and OAR20q22, OLADRB (MHC) to BBU2p22 and OAR20q22. All mapped loci appeared to be located on homologous chromosomes and chromosome bands in both bovids. Comparison between gene orders in bovid (BBU and OAR) and human (HSA) chromosomes revealed complex rearrangements, especially between BBU7/OAR6 and HSA4, as well as between BBU2p/OAR20 and HSA6p.